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LibJS: Distinguish between statement and declaration

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This separates matching/parsing of statements and declarations and
fixes a few edge cases where the parser would incorrectly accept a
declaration where only a statement is allowed - for example:

    if (foo) const a = 1;
    for (var bar;;) function b() {}
    while (baz) class c {}
This commit is contained in:
Linus Groh 2020-10-22 23:30:07 +01:00 • committed by Andreas Kling
parent f8ae6fa713
commit 80bb62b9cc
4 changed files with 73 additions and 30 deletions
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6
Libraries/LibJS/Tests/parser-declaration-in-single-statement-context.js Normal file
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@ -0,0 +1,6 @@
test("Declaration in single-statement context is a syntax error", () => {
expect("if (0) const foo = 1").not.toEval();
expect("while (0) function foo() {}").not.toEval();
expect("for (var 0;;) class foo() {}").not.toEval();
expect("do let foo = 1 while (0)").not.toEval();
});